Find arccos (sqrt2/2). Can this be pi/4 and 7pi/4?

So I have f(x)= arccos(cos(x)). When I graphed it on a graphing calculator I see that the f(x) is ne...

what is the arccos(2)? I have tried to use the unit circle but I do not understand this :/.

Find the solution. 1. sqrt2 sin x + 1 = 0 My ans: x = 5pi/4 + 2npi and 7pi/4 + 2npi 2. sec...

y=arccos(sin(x)), find dy/dx and sketch it's graph(I guess I can do this on wolframalpha after I'm d...

y=arccos(sin(x)), find dy/dx. I got -1, is this correct? When I tried to check on wolfram alpha I...

How do i get arcsin, arccos, arctan, arccot, arccsc, and arcsec on my calculator?

1) What is the value of arccos x as x approaches 1 from the left? 2) What is the value of arcsin x...

simplify sin(2 arccos(x))

Let \[f(x) = (\arccos x)^2 \cdot (\arcsin x)^2.\] Find the range of $f(x).$ All functions are in...

sin(arccos(−11/12))

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